US4719081A
Expired / Lapsed
US
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Palladium alloy for joining ceramics and method of use
Assignee: Osram Sylvania Inc
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Filing: 1986-12-12
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Granted: 1988-01-12
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Expires: 2006-12-12
Abstract
Abstract An alloy for joining ceramics has the following composition, by weight: 65 to 98% palladium; 1 to 20% nickel; 0.5 to 20% chromium; 0.5 to 10% titanium or zirconium; 0 to 10% molybdenum.
Inventors
- 👤 Howard Mizuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:58
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/322; C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; C22; C22C; C22C5/00; C22C5/04; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/36; C04B2237/365; C04B2237/368; C04B2237/50; C04B2237/70; C04B2237/708; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
An alloy for joining ceramics consisting of the following composition by weight: 65 to 98% palladium; 1 to 20% nickel; 0.5 to 20% chromium; 0.5 to 10% titanium or zirconium; 0 to 10% molybdenum, the composition having a liquidus temperature above 1300° C.
Claim 2
Dependent Claim
43 words
An alloy for joining ceramics consisting of the following composition by weight: 65 to 98% palladium; 1 to 20% nickel; 0.5 to 20% chromium; 0.5 to 10% titanium or zirconium; 0 to 10% molybdenum, the composition having a liquidus temperature above 1300° C.
Claim 3
Dependent Claim
15 words
The alloy of claim 1 wherein the alloy is in the form of a foil.
Claim 4
Dependent Claim
21 words
The method of joining ceramic materials using the alloy of claim 1 by vacuum heating the alloy above its liquidus temperature.
Claim 5
Dependent Claim
19 words
An alloy foil in accordance with claim 2 having the composition 83% Pd, 10% Cr, 5% Ni; 2% Ti.
Claim 6
Dependent Claim
19 words
An alloy foil in accordance with claim 2 having the composition 93% Pd, 4% Ni, 1% Cr, 2% Ti.
Claim 7
Dependent Claim
21 words
An alloy foil in accordance with claim 2 having the composition 78% Pd, 5% Cr, 10% Ni, 6% Mo, 1% Ti.
Claim 8
Dependent Claim
19 words
An alloy foil in accordance with claim 2 having the composition 74% Pd, 4% Cr, 20% Ni, 2% Zr.
Claim 9
Dependent Claim
21 words
The method of joining two pieces of silicon nitride by vacuum brazing at 1420° C. using the foil of claim 4.
Claim 10
Dependent Claim
21 words
The method of joining two pieces of silicon nitride by vacuum brazing at 1520° C. using the foil of claim 5.
Claim 11
Dependent Claim
20 words
The method of joining two pieces of alumina by vacuum brazing at 1410° C. using the foil of claim 6.
Claim 12
Dependent Claim
21 words
The method of joining ceramics using the foil of claim 7 by vacuum heating the foil to above its liquidus temperature.
Claim 13
Dependent Claim
21 words
The method of joining two pieces of silicon carbide by vacuum brazing at 1350° C. using the foil of claim 7.
References Cited (Backward Citations)
US3277150A
Cited
US4447391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |